Double-support belt wheel transmission structure

Abstract

The utility model provides a double-support belt wheel transmission structure. Relates to the field of transmission systems, and aims to solve the problem that a cantilever structure in an existing belt wheel transmission structure easily causes fatigue of a shaft to affect stability, a motor shaft is indirectly prolonged through an external shaft, the contact area of a first shaft hole in a driving wheel and an internal supporting shaft is increased, and the transmission stability is guaranteed; and the bearing is arranged on the supporting seat on the outer side, so that the output end and the power input end of the motor are provided with supporting points, the mechanical fatigue of the cantilever shaft is avoided, the transmission stability is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of transmission systems, in particular to a double-support pulley transmission structure. Background Art

[0002] The connection method of the motor in deep hole equipment generally adopts the direct connection method of motor-coupling-drive shaft. In the direct connection method, the transmission noise is relatively large due to the large number of transmission shafts, meshing gears and the existence of couplings, and the spindle box occupies a large space. In order to reduce the number of transmission shafts and meshing gears, reduce noise, and rationally utilize the limited space of the box, belt drive can be selected. Belt drive is relatively stable, can mitigate impact, reduce vibration, and effectively reduce noise. By reasonably selecting the safety factor of the belt, it can also prevent damage to the transmission parts and is easy to install and maintain.

[0003] A Chinese patent (publication number: CN 217643026 U) discloses a roller drive mechanism, wherein the reduction structure includes a support seat and a bridge pulley disposed on the support seat, the cylinder body being connected to a driving pulley portion 1, the bridge pulley including a coaxially arranged driven pulley portion 1 and a driving pulley portion 2, the roller being fixedly connected to the driven pulley portion 2, the driven pulley portion 1 and the driving pulley portion 1 being connected by a belt 1, and the driven pulley portion 2 and the driving pulley portion 2 being connected by a belt 2; however, the axial length of the driving pulley is relatively small, so that one cantilever end of the motor shaft can cooperate with the support to achieve stable support. For high-power transmission, the number of belts is large and the pulley outer dimensions are relatively large. The motor shaft cannot fully contact the inner hole of the driving pulley in terms of length, and the motor output shaft is difficult to pass through the pulley. As a result, in general belt transmissions, both the driving pulley and the driven pulley are cantilever structures, and the cantilever structure has poor balance conditions and stability. Under the same load transmission, the shaft in the cantilever structure is prone to mechanical fatigue, affecting the stability of the transmission structure. Utility Model Content

[0004] The purpose of the utility model is to address the defects of the existing technology and provide a double-support pulley transmission structure, which indirectly extends the motor shaft through an external shaft, increases the contact area between the first shaft hole in the driving wheel and the internal support shaft, and ensures the stability of its transmission; and provides bearings for the support seat on the outside, so that the output end and the power input end of the motor have support points, avoiding mechanical fatigue of the cantilever shaft, increasing the stability of the transmission, and extending the service life.

[0005] In order to achieve the above objectives, the following technical solutions are adopted:

[0006] A double-support pulley transmission structure, comprising:

[0007] The driving wheel is provided with a first shaft hole, one end of the first shaft hole is connected to the motor output shaft, and the other end is installed with an external shaft, one end of the external shaft extends into the first shaft hole, and the other end extends to the outside of the driving wheel, and the external shaft segment located outside the first shaft hole is rotatably mounted on the driving wheel support seat through a bearing;

[0008] The driven wheel is provided with a second shaft hole, the second shaft hole is matched with the driven shaft, and the segment of the driven shaft located outside the second shaft hole is rotatably mounted on the driven wheel support seat through a bearing; the driving wheel and the driven wheel are driven by a transmission belt.

[0009] Furthermore, the circumscribed shaft is a stepped shaft, and the section of the stepped shaft extending into the first shaft hole is connected to a flange. The flange is located outside the first shaft hole and is connected to the driving wheel through a fastener, so that the circumscribed shaft and the driving wheel rotate at the same angular velocity.

[0010] Furthermore, the flange is coaxially arranged with the circumscribed shaft, a plurality of through holes are provided on the flange, one end of the flange abuts against the end face of the driving wheel, the fasteners correspond to the through holes one by one, and the fasteners are installed on the driving wheel through the through holes.

[0011] Furthermore, the circumscribed shaft is equipped with at least two bearings distributed at intervals, and adjacent bearings are separated by a shaft sleeve sleeved on the circumscribed shaft.

[0012] Furthermore, a first support hole is provided on the driving wheel support seat, and the bearing is located in the first support hole and the outer ring of the bearing is in contact with the inner wall of the first support hole.

[0013] Furthermore, the circumscribed shaft passes through one end of the first support hole and extends into the first support hole, and the other end of the first support hole is sealed by a pressure cover, on which an oil cup is installed.

[0014] Furthermore, the driven shaft is equipped with at least two bearings distributed at intervals, and adjacent bearings and the bearings and the driven wheel are separated by a sleeve sleeved on the driven shaft.

[0015] Furthermore, a second support hole is provided on the driven wheel support seat, and the bearing sleeved on the driven shaft is located in the second support hole, and the outer ring of the bearing is fitted to the inner wall of the second support hole.

[0016] Furthermore, the circumscribed shaft passes through one end of the second support hole and extends into the second support hole, and the other end of the second support hole is sealed by a pressure cover, on which an oil cup is installed.

[0017] Furthermore, the driving wheel and the driven wheel are both pulleys, and the driving wheel and the driven wheel are driven by a belt.

[0018] Compared with the prior art, the advantages and positive effects of this utility model are:

[0019] 1. In order to address the problem that the cantilever structure in the current pulley transmission structure easily causes shaft fatigue and affects stability, the motor shaft is indirectly extended through an external shaft, and the contact area between the first shaft hole in the driving wheel and the internal support shaft is increased to ensure its transmission stability; and bearings are set for the support seat on the outside, so that the output end and power input end of the motor have support points, avoiding mechanical fatigue of the cantilever shaft, increasing transmission stability and extending service life.

[0020] 2. A multi-bearing structure is adopted, and the bearings are separated by sleeves. A multi-position support structure is established on the support seat to improve the stability of the external shaft and driven shaft matched with the support seat, so that the transmission structure can operate stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] Figure 1 This is a schematic diagram of the double-support pulley transmission structure in an embodiment of the present utility model.

[0023] Figure 2 It is a schematic diagram of the driving wheel and the support seat in the embodiment of the utility model.

[0024] Figure 3 Schematic diagram of the driven wheel and the support seat in the embodiment of the present utility model.

[0025] In the figure, 1. Motor, 2. Driving pulley, 3. Driving pulley support seat, 4. Belt, 5. Driven pulley, 6. Driven pulley support seat, 7. External shaft, 8. Bearing, 9. Gland, 10. Oil cup. DETAILED DESCRIPTION

[0026] In a typical embodiment of the present invention, Figure 1-Figure 3 As shown, a double-support pulley transmission structure is proposed.

[0027] In a high-power pulley transmission structure, due to the large number of belts 4, the pulley size that cooperates with the belt 4 is large, especially the axial length is large. When the axial length of the output shaft of the motor 1 is small, the pulley will form a cantilever structure, affecting the stability of the pulley, easily causing mechanical fatigue during operation, and affecting the stability of the transmission structure. Based on this, this embodiment provides a dual-support pulley transmission structure, which indirectly extends the motor 1 shaft by cooperating with the external shaft 7 and the driving pulley 2, increasing the contact area between the first axial hole of the driving pulley 2 and the external shaft 7 and the motor 1 shaft, so that the two ends of the driving pulley 2 are supported respectively, and the driven pulley 5 is also supported by the support seat, ensuring its transmission stability.

[0028] like Figure 1 As shown, the double-support pulley transmission structure includes a driving wheel 2, a driven wheel 5, a support seat and a transmission belt. The driving wheel 2 is provided with a first axial hole, one end of the first axial hole is connected to the output shaft of the motor 1, and the other end is installed with an circumscribed shaft 7. One end of the circumscribed shaft 7 extends into the first axial hole, and the other end extends to the outside of the driving wheel 2. The segment of the circumscribed shaft 7 located outside the first axial hole is rotatably mounted on the driving wheel support seat 3 through a bearing 8; the driven wheel 5 is provided with a second axial hole, and the second axial hole is matched with a driven shaft. The segment of the driven shaft located outside the second axial hole is rotatably mounted on the driven wheel support seat 6 through a bearing 8; the driving wheel 2 and the driven wheel 5 are driven by a transmission belt.

[0029] like Figure 2 As shown, the first axial hole provided in the center of the driving wheel 2 is connected to the output shaft of the motor 1. The motor 1 shaft is directly inserted into and fixed at one end of the first axial hole, ensuring direct power transmission. During connection, power transmission between the output shaft of the motor 1 and the driving wheel 2 can be achieved by using a key in a keyway provided on the motor 1 and a key.

[0030] An external shaft 7 is installed at the other end of the first shaft hole, which extends the effective length of the motor 1 shaft, so that both ends of the driving wheel 2 can be supported to form a simply supported structure, thereby enhancing the stability and strength of the overall structure and improving the poor stability problem caused by the cantilever installation on the output shaft of the motor 1.

[0031] The portion of circumscribed shaft 7 extending from the first axial hole is rotatably mounted on driving pulley support 3 via bearing 8. This reduces friction between circumscribed shaft 7 and the support, improving transmission efficiency and effectively preventing mechanical fatigue that can occur with a cantilevered shaft. The inclusion of bearing 8 also enhances the structural support capacity, ensuring smooth and reliable transmission.

[0032] like Figure 3 As shown, the second axial hole in the center of the driven wheel 5 cooperates with the driven shaft to enable the rotation of the driven wheel 5, ensuring that the driven wheel 5 can stably receive power from the driving wheel 2. Similar to the driving wheel 2, the portion of the driven shaft extending from the second axial hole is also rotatably mounted on the driven wheel support 6 via bearing 8. This also reduces friction, improves transmission efficiency, and enhances the stability and life of the structure.

[0033] Power is transmitted between the driving wheel 2 and the driven wheel 5 via a transmission belt. This non-rigid connection effectively absorbs vibration and shock during the transmission process. The design of the external shaft 7 increases the contact area between the first axial hole in the driving wheel 2 and the supporting shaft, effectively improving the stability of the transmission.

[0034] Circumscribed shaft 7 is a stepped shaft. The section of the stepped shaft that extends into the first axial hole is connected to a flange. The flange is located outside the first axial hole and is connected to driving wheel 2 via fasteners, allowing circumscribed shaft 7 and driving wheel 2 to rotate at the same angular velocity. The flange ensures a secure connection between circumscribed shaft 7 and driving wheel 2, enabling them to rotate at the same angular velocity, thus avoiding transmission failure or damage caused by a loose connection. This improves transmission reliability and stability, ensuring continuous power transmission.

[0035] The flange is coaxially arranged with the circumscribed shaft 7 and has multiple through-holes. One end of the flange abuts the end face of the driving wheel 2. Fasteners are aligned with the through-holes and are installed on the driving wheel 2 through the through-holes. This makes the connection more uniform and stable, avoiding stress concentration caused by uneven distribution of connection points. This enhances the strength and durability of the connection and improves the stability of the transmission.

[0036] In this embodiment, the fastener can be a screw. A threaded hole is opened on the end surface of the driving shaft. After passing through the through hole on the flange, the screw can match the threaded hole on the driving shaft to press the flange onto the driving wheel 2.

[0037] At least two spaced-apart bearings 8 are mounted on the circumscribed shaft 7, with adjacent bearings 8 separated by bushings. This reduces the mutual influence between the bearings 8, improving their operating accuracy and lifespan. The use of bushings also facilitates the installation and maintenance of the bearings 8, improving transmission smoothness and accuracy while reducing maintenance costs.

[0038] like Figure 2 As shown, in this embodiment, two bearings 8 are installed on the circumscribed shaft 7 to provide support for the circumscribed shaft 7. Both the driving wheel support base 3 and the driven wheel support base 6 are bracket structures that provide auxiliary support for the driving wheel 2 and the driven wheel 5 through the bearings 8. The driving wheel support base 3 is provided with a first support hole, in which the bearing 8 is located, forming a rotating support structure.

[0039] One end of the circumscribed shaft 7 extends through the first support hole, and the other end of the first support hole is sealed by a gland 9, which is equipped with an oil cup 10. This ensures stable installation and lubrication of the bearing 8 while preventing the ingress of dust and impurities. This extends the service life of the bearing 8 and improves transmission reliability.

[0040] like Figure 3 As shown, similar to the driving wheel 2, the driven shaft is also equipped with multiple spaced bearings 8 separated by sleeves. The driven wheel support seat 6 is provided with a second support hole, in which the bearing 8 is located, and is sealed and lubricated by a gland 9 and an oil cup 10.

[0041] Specifically, the driven shaft is fitted with two spaced-apart bearings 8. Adjacent bearings 8 and the driven pulley 5 are separated by sleeves sleeved on the driven shaft. The sleeves between the bearings 8 and the driven pulley 5 isolate the driven pulley 5 and the bearings 8, minimizing their mutual influence. A circumscribed shaft 7 extends through one end of the second support hole and into the second support hole. The other end of the second support hole is sealed by a gland 9.

[0042] The installation, lubrication and dust prevention problems of the bearing 8 are solved, the stable operation of the driven shaft is ensured, the transmission accuracy and service life of the driven wheel 5 are improved, and the reliability of the entire transmission system is enhanced.

[0043] like Figure 1 As shown, in this embodiment, the driving wheel 2 and the driven wheel 5 are both pulleys with wheel grooves that can fit the belt 4, so that the driving wheel 2 and the driven wheel 5 are transmitted through the belt 4. The belt 4 has a buffering and shock-absorbing effect, which can absorb the impact and vibration during the transmission process and protect the transmission components from damage.

[0044] In other optional embodiments, the driving wheel 2 and the driven wheel 5 can both be synchronous wheels, and the transmission belt can be a synchronous belt, and the driving wheel 2 and the driven wheel 5 are driven by the synchronous belt. The driving wheel 2 and the driven wheel 5 can also be sprockets, and the transmission belt can be a chain, and the driving wheel 2 and the driven wheel 5 are driven by the chain.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A double-support pulley transmission structure, characterized in that: include: The driving wheel is provided with a first shaft hole, one end of the first shaft hole is connected to the motor output shaft, and the other end is installed with an external shaft, one end of the external shaft extends into the first shaft hole, and the other end extends to the outside of the driving wheel, and the external shaft segment located outside the first shaft hole is rotatably mounted on the driving wheel support seat through a bearing; The driven wheel is provided with a second shaft hole, the second shaft hole is matched with the driven shaft, and the segment of the driven shaft located outside the second shaft hole is rotatably mounted on the driven wheel support seat through a bearing; the driving wheel and the driven wheel are driven by a transmission belt.

2. The double-support pulley transmission structure according to claim 1, characterized in that: The circumscribed shaft is a stepped shaft, and the segment of the stepped shaft extending into the first shaft hole is connected to a flange. The flange is located outside the first shaft hole and is connected to the driving wheel through a fastener, so that the circumscribed shaft and the driving wheel rotate at the same angular velocity.

3. The double-support pulley transmission structure according to claim 2, characterized in that: The flange is coaxially arranged with the circumscribed shaft, and a plurality of through holes are provided on the flange. One end of the flange abuts against the end face of the driving wheel, and the fasteners correspond to the through holes one by one. The fasteners are installed on the driving wheel through the through holes.

4. The double-support pulley transmission structure according to claim 1, 2 or 3, characterized in that: The circumscribed shaft is equipped with at least two bearings distributed at intervals, and adjacent bearings are separated by a shaft sleeve sleeved on the circumscribed shaft.

5. The double-support pulley transmission structure according to claim 4, characterized in that: The driving wheel support seat is provided with a first support hole, the bearing is located in the first support hole and the outer ring of the bearing is in contact with the inner wall of the first support hole.

6. The double-support pulley transmission structure according to claim 5, characterized in that: The circumscribed shaft passes through one end of the first supporting hole and extends into the first supporting hole. The other end of the first supporting hole is sealed by a pressure cover, and an oil cup is installed on the pressure cover.

7. The double-support pulley transmission structure according to claim 1, characterized in that: The driven shaft is equipped with at least two bearings distributed at intervals, and adjacent bearings and the bearings and the driven wheel are separated by shaft sleeves sleeved on the driven shaft.

8. The double-support pulley transmission structure according to claim 1 or 7, characterized in that: The driven wheel support seat is provided with a second support hole, the bearing sleeved on the driven shaft is located in the second support hole, and the outer ring of the bearing is fitted to the inner wall of the second support hole.

9. The double-support pulley transmission structure according to claim 8, characterized in that: The circumscribed shaft passes through one end of the second supporting hole and penetrates into the second supporting hole. The other end of the second supporting hole is sealed by a pressure cover, and an oil cup is installed on the pressure cover.

10. The double-support pulley transmission structure according to claim 1, wherein: The driving wheel and the driven wheel are both pulleys, and the driving wheel and the driven wheel are driven by a belt.

Images